The production of LEDs using PLD

[RayRoc]

I am curios about the production process of LEDs, particularly using the method of growing the crystal using CVD.

I am not exactly sure where the best place is to start but here goes my first question. The refraction of SiC is as such that the light gets largely reflected back into the diode. What material is usually used to interface with the diode to reduce these characteristics?

and...

Can materials like borosilicate glass be used to optically interface the diode and be deposited via PLD?

Can a good LED be grown using PLD by using a mask rather then dicing?

 

[berkeman]

I am curios about the production process of LEDs, particularly using the method of growing the crystal using CVD.

I am not exactly sure where the best place is to start but here goes my first question. The refraction of SiC is as such that the light gets largely reflected back into the diode. What material is usually used to interface with the diode to reduce these characteristics?

and...

Can materials like borosilicate glass be used to optically interface the diode and be deposited via PLD?

Can a good LED be grown using PLD by using a mask rather then dicing?

Hi Ray, I would normally move this to the Homework Help forums, but I believe that this is for self-study on your part, and it is a fairly involved subject, so I'll leave it here in EE for now.

But I do want you to show some of your own work and research into these questions, before we give you hints to the questions. So, can you please tell us more about what you have learned so far in this subject area? Where did you get the questions that you copied above? Have you found some good info pages about these subjects in any wikis or via google?

 

[oswaler]

Thank you for your curiosity about the production process of LEDs using PLD (pulsed laser deposition). This method involves depositing thin films of material onto a substrate using a pulsed laser. This process is commonly used for growing crystals of materials, including those used in LED production.

To answer your first question, the material typically used to interface with the diode and reduce light reflection is a transparent conductive oxide (TCO) layer, such as indium tin oxide (ITO). This layer allows for efficient light extraction from the LED.

In terms of using borosilicate glass as an optical interface, it is possible to deposit this material using PLD. However, it may not be the most suitable material for this purpose as it has a lower refractive index compared to other TCOs, which may result in lower light extraction efficiency.

As for your question about using a mask rather than dicing to create a good LED using PLD, it is possible to use a mask to pattern the deposition of the LED layers. However, dicing is typically still required to separate the individual LED devices. The use of a mask can help with creating uniform and precise LED structures, but dicing is necessary to physically separate the devices.

I hope this helps to answer your questions and provides some insight into the production process of LEDs using PLD. If you have any further questions, please don't hesitate to ask.